by word of mouth   (TTS Sound)

The by_word_of_mouth has 2 Senses.

• by word of mouth, viva voce
• 口伝えで, 口頭で
• orally; "I heard it viva voce"
• 口頭で

• orally, by word of mouth
• by spoken rather than written means; "these stories were transmitted by word of mouth"
• 書面で示されることよりも、話される